Larval control generally has the least effect on non-target species and the environment and is used to control mosquitoes in the aquatic stage before they become adults.
In Adams County, naturally occurring bacteria are used to control mosquito larvae in problematic areas such as tire piles and catch basins. The bacteria are applied to standing water where the mosquito larvae are concentrated. The bacterium kills the mosquito larva after it is ingested. Adult mosquito control is only considered when evidence of the virus has been established or when nuisance levels become extreme.
A press release will be sent to the local TV and Newspapers specifying the location, product used, and time of application at least 48 hours prior to any adult control operation.